3260 and 3532 are undergoing Rail Vehicle Accessibility Regulations (RVAR) modifications. There expected OK date is 1 December, so that fits with a recent-ish test run, hopefully nearly finished.
91001, 91093, 91109, 93026, 93054, 93176 and 93206 are all stopped as part of the Central Line Improvement Programme (CLIP) for fitting AC Traction.
91101 has been waiting materials for some time and remains stopped past its expected return date.
93150 has the same modification as 91341 (see many posts in this thread) and is long term stopped and will likely not be touched until it and 91341 enter the CLIP programme.
91209 is working train 57 and is just approaching Ealing Broadway as of 11:27 today.
21463/464, 21487/488 and 21549/550 are all stopped expected back at the end of the year.
21479/480 are not expected back until March 2023.
Take these dates to be an aspiration rather than a guarantee...
21503/504 is also stopped showing the end of the year as its return date...
The Jubilee line units listed above all appear to be stopped and were last recorded working on:
96017 16 February 2022
96049 25 November 2021
96111 17 June 2022
96126 9 August 2020
I don't have details of why they are stopped or when they might return to service I'm afraid.